212222400121 has 8 divisors (see below), whose sum is σ = 214821994464. Its totient is φ = 209623822560.

The previous prime is 212222400101. The next prime is 212222400151. The reversal of 212222400121 is 121004222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212222400121 - 2²⁵ = 212188845689 is a prime.

It is a super-2 number, since 2×212222400121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222400101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170110 + ... + 673336.

It is an arithmetic number, because the mean of its divisors is an integer number (26852749308).

Almost surely, 2^212222400121 is an apocalyptic number.

It is an amenable number.

212222400121 is a deficient number, since it is larger than the sum of its proper divisors (2599594343).

212222400121 is an equidigital number, since it uses as much as digits as its factorization.

212222400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508391.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212222400121 its reverse (121004222212), we get a palindrome (333226622333).

The spelling of 212222400121 in words is "two hundred twelve billion, two hundred twenty-two million, four hundred thousand, one hundred twenty-one".